This is the mail archive of the binutils@sourceware.org mailing list for the binutils project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
On 05/08/2017 05:43 PM, H.J. Lu wrote:
Yes IMO, LD_AUDIT + -z now should force the GOT entries to remain forever resolved to the stub PLT entry in a read-only mapping. This however means keeping around the PLT entries, which is what you're trying to remove, but shouldn't without an additional optimization flag.-z now has disabled LD_AUDIT since binutils 2.26.
I think this is a bug in binutils 2.26 and later. I did not realize this at the time (my understanding of LD_AUDIT is limited).
We both have large-scale users of LD_AUDIT. They might be able to migrate off x86 before the -z now breakage hits them (keep in mind that we have pushed -z now as a recommended hardening flag for a long time), but I wouldn't count on that, and I wouldn't want to subject them to that anyway.
This is bad. I know of lots of users that are going to be unhappy if we continue to remove LD_AUDIT support. For now it works in their own applications, but I'd like to see LD_AUDIT work with -z now.I didn't see any binutils bug report for this issue. Also there is no glibc test to check that -z now works with LD_AUDIT.
There were, sort of, but you adjusted those tests instead of revisiting the binutils change and its impact. I'm afraid I didn't realize that at the time.
Thanks, Florian
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |